Oprah Winfrey has pledged to match actor George Clooney and his wife Amal in donating half a million dollars (£357,000) to students organising protests against gun violence in the US.

The TV personality wrote on Twitter that she “couldn’t agree more” with the actor, who had said “our children’s lives depend on it”, and said she would donate the same amount to the March For Our Lives fund.

On Tuesday, Clooney said he would attend next month’s protest with his wife, a human rights lawyer, as he praised the “courage and eloquence” of the survivors of the Florida school shooting that killed 17.

George and Amal, I couldn’t agree with you more. I am joining forces with you and will match your $500,000 donation to ‘March For Our Lives.’ These inspiring young people remind me of the Freedom Riders of the 60s who also said we’ve had ENOUGH and our voices will be heard.

Students have turned activists in the wake of the Stoneman Douglas High School atrocity and have led calls for stricter gun controls in the country where school shootings have become routine.

In a statement, George Clooney said they would make the donation to March For Our Lives in the names of their eight-month-old twins, Ella and Alexander.

“Amal and I are so inspired by the courage and eloquence of these young men and women from Stoneman Douglas High School,” he said.

“Our family will be there on March 24 to stand side by side with this incredible generation of young people from all over the country, and in the name of our children Ella and Alexander, we’re donating 500,000 dollars to help pay for this ground-breaking event.

The March For Our Lives protest, led by students, will see demonstrators gather in Washington DC to call for new laws to prevent the “rampant” gun violence.

“Every kid in this country now goes to school wondering if this day might be their last. We live in fear,” its mission statement added.

The alleged gunman, 19-year-old former student Nikolas Cruz, is reported to have been legally sold the assault rifle used in the February 14 attack, despite having a history of mental health issues.

Survivors, stars and politicians have all called on the Republican Party and US president Donald Trump to impose stricter gun controls in the wake of the attack, which was the eighth school shooting to cause injury or death this year.

Students from several Florida high schools also staged a walk-out on Tuesday in a showing of solidarity to the 14 students and three staff members killed.